PolarTREC teacher Bill Schmoker, one of 14 teachers nationwide, has been awarded the National Geographic Grosvenor Teacher Fellowship. This article describes his upcoming National Geographic expedition to the Arctic Ocean aboard its research ship 'Explorer'.
Dr. Jacqueline Grebmeier presents an overview of the arctic ocean ecosystem. She outlines the key environmental factors influencing arctic marine food webs and discusses recent changes in biogeochemical cycles, biodiversity, migration and range of species, and general ecosystem health in the region.
Density currents drive 3D movements within the world’s oceans that dwarf surface currents by volume. Density-driven movements due to temperature/salinity differences keep the world’s oceans well mixed & help to re-distribute heat from tropical areas towards polar areas. Resultant upwelling creates some of the world’s richest ocean ecosystems. Density movements known as turbidity currents are the world’s largest